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https://www.readbyqxmd.com/read/28934146/exploiting-the-capture-effect-to-enhance-rach-performance-in-cellular-based-m2m-communications
#1
Jonghun Kim, Jaiyong Lee
Cellular-based machine-to-machine (M2M) communication is expected to facilitate services for the Internet of Things (IoT). However, because cellular networks are designed for human users, they have some limitations. Random access channel (RACH) congestion caused by massive access from M2M devices is one of the biggest factors hindering cellular-based M2M services because the RACH congestion causes random access (RA) throughput degradation and connection failures to the devices. In this paper, we show the possibility exploiting the capture effects, which have been known to have a positive impact on the wireless network system, on RA procedure for improving the RA performance of M2M devices...
September 21, 2017: Sensors
https://www.readbyqxmd.com/read/28932163/preparedness-of-dammam-primary-health-care-centers-to-deal-with-emergency-cases
#2
Sanaa S M Alsaad, Salma H S Abu-Grain, Dalia Y M El-Kheir
OBJECTIVES: The objective of the study was to assess the availability of human and nonhuman resources for emergency medical services (EMSs) at the primary health care (PHC) level. MATERIALS AND METHODS: A cross-sectional study with mixed research methods (quantitative and qualitative) was carried out in governmental PHC centers in Dammam, Eastern Province of Saudi Arabia, between September 2014 and January 2015. Using systematic random sampling technique, 13 out of 26 PHC centers were included in the study...
September 2017: Journal of Family & Community Medicine
https://www.readbyqxmd.com/read/28931997/the-effects-of-ratio-in-the-multifidus-muscle-thickness-according-to-various-angle-of-mediolateral-ramp-during-double-stance
#3
Sang-Yeol Lee
[Purpose] This study was conducted to predict the risks of standing on mediolateral ramps by identifying the ratios of the multifidus muscles on the two sides of the spine when standing postures are maintained on mediolateral ramps of diverse angles. [Subjects and Methods] The study was conducted with 15 healthy adult males. All subjects participated voluntarily. Mediolateral ramps at five angles (0°, 5°, 10°, 15°, and 20°) were used. Ultrasonography was used to determine the thicknesses of the multifidus muscles under individual conditions...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28931547/the-plateau-in-the-nirs-derived-hhb-signal-near-the-end-of-a-ramp-incremental-test-does-not-indicate-the-upper-limit-of-o2-extraction-in-the-vastus-lateralis
#4
Erin Calaine Inglis, Danilo Iannetta, Juan M Murias
This study aimed to examine, at the level of the active muscles, whether the plateau in oxygen (O2) extraction normally observed near the end of a ramp incremental (RI) exercise test to exhaustion, is caused by the achievement of an upper limit in O2 extraction. 11 healthy men (27.3 ± 3.0 years; 81.6 ± 8.1 kg; 183.9 ± 6.3 cm) performed a RI cycling test to exhaustion. O2 extraction of the vastus lateralis (VL) was measured continuously throughout the test using the near-infrared spectroscopy (NIRS)-derived deoxygenated hemoglobin [HHb] signal...
September 20, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28930091/proposal-to-assess-printability-of-bioinks-for-extrusion-based-bioprinting-and-evaluation-of-rheological-properties-governing-bioprintability
#5
Naomi Claire Paxton, Willi Smolan, Thomas Böck, Ferry P W Melchels, Juergen Groll, Tomasz Juengst
The development and formulation of printable inks for extrusion-based 3D bioprinting has been a major challenge in the field of biofabrication. Inks, often polymer solutions with the addition of crosslinking to form hydrogels, must not only display adequate mechanical properties for the chosen application, but also show high biocompatibility as well as printability. Here we describe a reproducible two-step method for the assessment of the printability of inks for bioprinting, focussing firstly on screening ink formulations to assess fibre formation and the ability to form 3D constructs before presenting a method for the rheological evaluation of inks to characterise the yield point, shear thinning and recovery behaviour...
September 20, 2017: Biofabrication
https://www.readbyqxmd.com/read/28927643/a-combined-kinematic-and-kinetic-analysis-at-the-residuum-socket-interface-of-a-knee-disarticulation-amputee
#6
Jinghua Tang, Michael McGrath, Nick Hale, Liudi Jiang, Dan Bader, Piotr Laszczak, David Moser, Saeed Zahedi
The bespoke interface between a lower limb residuum and a prosthetic socket is critical for an amputee's comfort and overall rehabilitation outcomes. Analysis of interface kinematics and kinetics is important to gain full understanding of the interface biomechanics, which could aid clinical socket fit, rehabilitation and amputee care. This pilot study aims to investigate the dynamic correlation between kinematic movement and kinetic stresses at the interface during walking tests on different terrains. One male, knee disarticulation amputee participated in the study...
September 15, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28915341/-31-p-magnetic-resonance-fingerprinting-for-rapid-quantification-of-creatine-kinase-reaction-rate-in-vivo
#7
Charlie Y Wang, Yuchi Liu, Shuying Huang, Mark A Griswold, Nicole Seiberlich, Xin Yu
The purpose of this work was to develop a (31) P spectroscopic magnetic resonance fingerprinting (MRF) method for fast quantification of the chemical exchange rate between phosphocreatine (PCr) and adenosine triphosphate (ATP) via creatine kinase (CK). A (31) P MRF sequence (CK-MRF) was developed to quantify the forward rate constant of ATP synthesis via CK ( kfCK), the T1 relaxation time of PCr ( T1PCr), and the PCr-to-ATP concentration ratio ( MRPCr). The CK-MRF sequence used a balanced steady-state free precession (bSSFP)-type excitation with ramped flip angles and a unique saturation scheme sensitive to the exchange between PCr and γATP...
September 15, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28913685/-ramp-lesions-tips-and-tricks-in-diagnostics-and-therapy
#8
REVIEW
R Seil, A Hoffmann, S Scheffler, D Theisen, C Mouton, D Pape
There is an increasing biomechanical and anatomical understanding of the different types of meniscal lesions. Lesions of the posterior part of the medial meniscus in the meniscosynovial area have recently received increased attention. They generally occur in association with anterior cruciate ligament (ACL) injuries. They are often missed ("hidden lesions") due to the fact that they cannot be seen by routine anterior arthroscopic inspection. Furthermore, meniscosynovial lesions play a role in anteroposterior knee laxity and, as such, they may be a cause of failure of ACL reconstruction or of postoperative persistent laxity...
September 14, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28912435/turning-behaviors-of-t-cells-climbing-up-ramp-like-structures-are-regulated-by-myosin-light-chain-kinase-activity-and-lamellipodia-formation
#9
Kwang Hoon Song, Jaehyun Lee, Hong-Ryul Jung, HyoungJun Park, Junsang Doh
T cells navigate diverse microenvironments to perform immune responses. Micro-scale topographical structures within the tissues, which may inherently exist in normal tissues or may be formed by inflammation or injury, can influence T cell migration, but how T cell migration is affected by such topographical structures have not been investigated. In this study, we fabricated ramp-like structures with a 5 μm height and various slopes, and observed T cells climbing up the ramp-like structures. T cells encountering the ramp-like structures exhibited MLC accumulation near head-tail junctions contacting the ramp-like structures, and made turns to the direction perpendicular to the ramp-like structures...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912260/decoupling-between-diastolic-pulmonary-artery-pressure-and-pulmonary-capillary-wedge-pressure-as-a-prognostic-factor-after-continuous-flow-ventricular-assist-device-implantation
#10
Teruhiko Imamura, Ben Chung, Ann Nguyen, Daniel Rodgers, Gabriel Sayer, Sirtaz Adatya, Nitasha Sarswat, Gene Kim, Jayant Raikhelkar, Takeyohi Ota, Tae Song, Colleen Juricek, Viktoriya Kagan, Valluvan Jeevanandam, Mandeep Mehra, Daniel Burkhoff, Nir Uriel
BACKGROUND: A cohort of heart failure (HF) patients receiving left ventricular assist devices (LVADs) has decoupling of their diastolic pulmonary artery pressure and pulmonary capillary wedge pressure. However, the clinical implications of this decoupling remain unclear. METHODS AND RESULTS: In this prospective study, patients with LVADs underwent routine invasive hemodynamic ramp testing with right heart catheterization, during which LVAD speeds were adjusted. Inappropriate decoupling was defined as a >5 mm Hg difference between diastolic pulmonary artery pressure and pulmonary capillary wedge pressure...
September 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28904253/genetic-variants-of-ramp2-and-clr-are-associated-with-stroke
#11
Teruhide Koyama, Nagato Kuriyama, Etsuko Ozaki, Daisuke Matsui, Isao Watanabe, Wakiko Takeshita, Komei Iwai, Yoshiyuki Watanabe, Masahiro Nakatochi, Chisato Shimanoe, Keitaro Tanaka, Isao Oze, Hidemi Ito, Hirokazu Uemura, Sakurako Katsuura-Kamano, Rie Ibusuki, Ippei Shimoshikiryo, Naoyuki Takashima, Aya Kadota, Sayo Kawai, Tae Sasakabe, Rieko Okada, Asahi Hishida, Mariko Naito, Kiyonori Kuriki, Kaori Endoh, Norihiro Furusyo, Hiroaki Ikezaki, Sadao Suzuki, Akihiro Hosono, Haruo Mikami, Yohko Nakamura, Michiaki Kubo, Kenji Wakai
AIM: Stroke is associated closely with vascular homeostasis, and several complex processes and interacting pathways, which involve various genetic and environmental factors, contribute to the risk of stroke. Although adrenomedullin (ADM) has a number of physiological and vasoprotective functions, there are few studies of the ADM receptor system in humans. The ADM receptor comprises a calcitonin-receptor-like receptor (CLR) and receptor activity-modifying proteins (RAMPs). We analyzed single nucleotide polymorphisms (SNPs) in the RAMP2 and CLR genes to determine their association with stroke in the light of gene-environment interactions...
September 14, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28902425/efficient-catalytic-microreactors-with-atomic-layer-deposited-platinum-nanoparticles-on-oxide-support
#12
Ville Rontu, Anne Selent, Vladimir Zhivonitko, Gianmario Scotti, Igor Koptyug, Ville-Veikko Telkki, Sami Franssila
Microreactors attract a significant interest for chemical synthesis due to benefits of small scales such as high surface to volume ratio, rapid thermal ramping and well-understood laminar flows. The suitability of atomic layer deposition for applying of both the catalyst nanoparticles and the support material on the surfaces of channels of microfabricated silicon microreactors is demonstrated in this research. Continuous flow hydrogenation of propene into propane at low temperatures with TiO₂ supported catalytic Pt nanoparticles was used as a model reaction...
September 13, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28890643/u-s-and-states-ramp-up-response-to-opioid-crisis-regulatory-legislative-and-legal-tools-brought-to-bear
#13
Stephen Barlas
Politicians in both parties and at all levels of government have raised what many call the opioid crisis to a level of public attention it has never seen before. This article reviews the approaches, including prevention, treatment, and medication-assisted therapy, being taken by federal and state authorities to combat the abuse of opioids.
September 2017: P & T: a Peer-reviewed Journal for Formulary Management
https://www.readbyqxmd.com/read/28885156/the-vspa-foot-a-quasi-passive-ankle-foot-prosthesis-with-continuously-variable-stiffness
#14
Max K Shepherd, Elliott J Rouse
Most commercially available prosthetic feet do not exhibit a biomimetic torque-angle relationship, and are unable to modulate their mechanics to assist with other mobility tasks, such as stairs and ramps. In this work, we present a quasi-passive ankle-foot prosthesis with a customizable torque-angle curve and an ability to quickly modulate ankle stiffness between tasks. The customizable torque-angle curve is obtained with a cam-based transmission and a fiberglass leaf spring. To achieve variable stiffness, the leaf spring's support conditions can be actively modulated by a small motor, shifting the torque-angle curve to be more or less stiff...
September 7, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28882343/a-retention-index-system-for-comprehensive-two-dimensional-gas-chromatography-using-polyethylene-glycols
#15
Cathrin Veenaas, Peter Haglund
The characterization and identification of compounds in complex real-world samples is quite difficult and new concepts and workflows are highly desirable. Retention indices (RIs) are widely used in gas chromatography (GC) to support the identification of unknown compounds. Several attempts have been made to introduce a similar concept for the second dimension in comprehensive two-dimensional (2D) GC (GC×GC) but, an easily applicable and robust system remains elusive. In the present study, a new RI system for GC×GC was developed...
August 25, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28879578/improved-wedge-method-for-the-measurement-of-sub-millimeter-slice-thicknesses-in-magnetic-resonance-imaging
#16
Tsutomu Kanazawa, Masaki Ohkubo, Tatsuya Kondo, Takayuki Miyazawa, Shoichi Inagawa
The standard method for measuring the slice thickness of magnetic resonance images uses the inclined surface of a wedge (wedge method); it is sensitive to small increases in noise because of the differentiation of the edge response function (ERF) required. The purpose of this study was to improve the wedge method by fitting a curve to the ERF. The curve-fit function was obtained by convolving an ideal ERF (a ramp function) with a Gaussian function to represent ERF blurring. Measurements of 5- and 3-mm slice thicknesses were performed on a 3T scanner using the conventional wedge method, the improved wedge method, and another standard method using an inclined slab (slab method)...
September 6, 2017: Radiological Physics and Technology
https://www.readbyqxmd.com/read/28873486/meniscal-ramp-lesion-repair-using-the-fast-fix-technique-evaluating-healing-and-patient-outcomes-with-second-look-arthroscopy
#17
Zhong Chen, Wei-Ping Li, Rui Yang, Bin Song, Chuan Jiang, Jing-Yi Hou, Huan Luo, Yun-Feng Zhou
No abstract text is available yet for this article.
September 5, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28873348/management-of-traumatic-meniscal-tear-and-degenerative-meniscal-lesions-save-the-meniscus
#18
REVIEW
P Beaufils, N Pujol
Meniscectomy remains one of the most frequent orthopedic procedures, despite meniscal sparing having been advocated for several decades now. Incidence is excessive in the light of scientifically robust studies demonstrating the interest of meniscal repair or of non-operative treatment for traumatic tear and of non-operative treatment for degenerative meniscal lesions. It is high time that the paradigm shifted, in favor of meniscal preservation. In traumatic tear, and most particularly longitudinal vertical tear in vascularized zones, repair shows a high success rates in terms of recovery time, functional outcome and cartilage protection...
September 2, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28867557/imaging-the-spatial-distribution-of-radiofrequency-field-sample-and-temperature-in-mas-nmr-rotor
#19
Hiroki Nagashima, Julien Trébosc, Olivier Lafon, Frédérique Pourpoint, Piotr Paluch, Marek J Potrzebowski, Jean-Paul Amoureux
We investigate using nutation experiments the spatial distribution of radiofrequency (rf) field, sample, temperature and cross-polarization transfer efficiency in 1.3 mm rotor. First, two-dimensional (2D) (1)H nutation experiments on silicone thin cylinders in the presence of B0 field gradient generated by shim coils are used to image the spatial distribution of rf field inside the rotor. These experiments show that the rf field is asymmetrical with respect to the center of the rotor. Moreover, they show the large inhomogeneity that still remains across the sample when using spacers, and that even in this case, the rf-field close to the drive cap is decreased to ca...
August 12, 2017: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/28863506/free-energy-models-for-ice-vii-and-liquid-water-derived-from-pressure-entropy-and-heat-capacity-relations
#20
Philip C Myint, Lorin X Benedict, Jonathan L Belof
We present equations of state relevant to conditions encountered in ramp and multiple-shock compression experiments of water. These experiments compress water from ambient conditions to pressures as high as about 14 GPa and temperatures of up to several hundreds of Kelvin. Water may freeze into ice VII during this process. Although there are several studies on the thermodynamic properties of ice VII, an accurate and analytic free energy model from which all other properties may be derived in a thermodynamically consistent manner has not been previously determined...
August 28, 2017: Journal of Chemical Physics
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